1438232256 has 84 divisors (see below), whose sum is σ = 4141289152. Its totient is φ = 477218304.

The previous prime is 1438232239. The next prime is 1438232273. The reversal of 1438232256 is 6522328341.

It is an interprime number because it is at equal distance from previous prime (1438232239) and next prime (1438232273).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1438232256.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122850 + ... + 134046.

Almost surely, 2^1438232256 is an apocalyptic number.

1438232256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1438232256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2070644576).

1438232256 is an abundant number, since it is smaller than the sum of its proper divisors (2703056896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1438232256 is a wasteful number, since it uses less digits than its factorization.

1438232256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11438 (or 11425 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 1438232256 is about 37924.0326969588. The cubic root of 1438232256 is about 1128.7809591108.

The spelling of 1438232256 in words is "one billion, four hundred thirty-eight million, two hundred thirty-two thousand, two hundred fifty-six".